Home / 11,220.81-15,478.93-6,742.90

Finding the Fourth Proportional to 11,220.81, 15,478.93 and 6,742.90

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Solution

The fourth proportional to 11,220.81, 15,478.93 and 6,742.90 is: 9,301.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.81 : 15,478.93 = 6,742.90 : x
  2. Step 2: Convert to fraction form
    11,220.81/15,478.93 = 6,742.90/x
  3. Step 3: Cross multiply
    11,220.81x = 15,478.93 × 6,742.90
  4. Step 4: Simplify right side
    11,220.81x = 104,372,877.10
  5. Step 5: Solve for x
    x = 104,372,877.10/11,220.81
  6. Step 6: Final answer
    x = 9,301.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.